John robertson



JOHN ROBERTSON, OF QUINCY, ILLINOIS.I

Leners Patent No. 76,526, ma Apta 7, 186s.

IMPROVEMENT IN VALVE-ROD CONNECTIONS.

'eige Srlgrtnlr turret in in llgrse trttrrs ntnu :um mating pint tf its'smite.

TO ALL WI-IOM IT MAY CONCERN:

Be it known that I, JOHN RQBERTSON, of Quincy, in the county of Adams,and State of Illinois, have invented a new and improved AdjustableValve-Rod Connection ;4 and I do hereby declarethat the following is afull, clear, and exact description thereof, which will enable thoseskilled in the art to make and use the saine, reference being had to theaccompanying drawings, forming part of this specification.

This 'invention relates to a new and improved device'for connecting thevalve-rod of a steam-engine to vthe eccentric-band, whereby the rod maybe adjusted to the proper length without turning it round or in anymanner disturbing any ofthe parts connected with it. v g

And the invention consists in a sleeve-nut attached to theeccentric-band, as hereinafter described.

Figure I represents a longitudinal section of the arrangement, throughthe line :v :c of lig. 2.

Figure 2 is a cross-section, through the lineg/ y ot' lig. 1.

Similar letters of reference indicate corresponding parts.

A represents the neck of the eccentric.

B is the sleeve-nut.

C is the valve-rod.

D is ajam-nut.

E is a set-screw.

As this connection has ordinarily been made, itl is necessary to turnthe rod in order to shorten or lengthen it, which, in the niceadjustment of the valve of u steam-engine, is very objectinablc,asproperly setting thev valve is a delicate operation.

Withthis connection' that operation can 'ne performed with the greatestnicetywithout disturbing the rod at all.

The sleeve-nut B is fitted to the recess in the neck oftheeccentric-band. y

a is a groove around the nut, to 'which the-end of the set-screw E isfitted, as seen in the drawing.

This screw keeps the sleeve in place, while the sleeve is allowed toturn freely in the neck of the eccentric n when it is desired to adjustthe rod. v i

When the rod is properly 'adjusted,the nut D is turned so as to presstightly on the sleeve and keep the connection rm. l, c, y

Two or more set-screws may, if found necessary, be used the same as Eis,vto hold the sleeve. I-Iaving thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is- The sleeve-nutB, arranged substantially as shown, whereby a valve-rod orconnecting-rod maybe adjusted .without turning the saule, substantiallyas described.

The above speciiication of my invention signed by me, this 21st day ofAugust, 1867.

JOHN ROBERTSON.

Witnesses:

Tnos'. HILL, ROBERT W. GARDNER.l

